San Diego County, San Diego Rat Control Situation:
Hi David, Is a UV blacklight still useful, exterior-wise, if it rains after the rodents leave their urine stains? I am in the process of performing exterior maintenance to better exclude my roof rats. 1) I have a 25 year old cedar shake roof in San Diego California with openings under each shake along the rake edge of the roof at the gable ends of my house. There's no drip edge, i.e. under the shakes I have roofing paper (now somewhat curled) that runs more or less up to and rests right atop the fascia board. Because I have skip sheathing, and since the cross section of a shake is a wedge that is up to one inch at the upper, thick end, this appears to create many huge entry points along the rake edges even though the sheathing is rabbeted into the fascia board. As a result, I'm thinking of getting a UV blacklight to use outside the house to sleuth for urine stains along the upper edge of the gable end shakes and fascia boards. My question is, how easily does the winter rain wash away the urine, rendering this a pointless exercise? 2) I noticed a new product called "rat-out gel" and was thinking of applying it along the rake edges mentioned above. Or, maybe I should just buy many rolls of X-Clude and use that instead. Or maybe both. Any comment? Thanks very much for your website, Doug
My response: First off, I do not have experience using UV lights to detect rat urine. But I do suspect that rain will severely limit the effectiveness of this approach. I have never heard of Rat-Out Gel or XClude, but I typically stick to physical barriers rather than repellent type devices. If your roof makes this impossible, you might have a tough time keeping the rats out.
San Diego Rat Control Tip of The Week
Why Do More Rats Live In Urban Areas Than In Wild Areas?
Statistically, more rats are living in urban areas than in the wild. This is simply because urban areas have an abundant availability of food that is easily accessible, compared to the wild where they have to go in search of food before they can find something to eat. Although, rats in the wild are known to live longer simply because they feed on natural foods.
The most dominant species of rats living in urban areas are roof rats and Norway rats. These species of rats have an adaptive feature that allows them to survive in any kind of environment and their rate of reproduction allows them to multiply rapidly in any home they find themselves in.
Apart from the availability of easily accessible food, urban areas have an abundant supply of places to nest and proliferate. In urban areas, there are houses around and each of these houses has attics, walls, roofs, and other hidden places where rats can nest. The search for a place to nest makes takes rats into urban areas that seem to have many good nesting places.
Also, the absence of predators in urban areas makes rats prefer to stay in urban areas than in the wild. In the wild, there is no adequate protection for them, and more than half will be hunted as prey before they even reach maturity.
All of the above reasons clearly show why there are more rats in urban areas than in wild areas. Having realized this, you need to do all you can to prevent them from infesting your home because if they do, they will multiply rapidly within just a short time.
